<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>12 小函数</title>
  <script>
    //    ParseInt(值，该数值的进制);
    console.log(parseInt(19.11));
    console.log(parseInt(19.99));
    console.log(parseInt("25px"));

  </script>
</head>
<body>

</body>
</html>